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278 lines
11 KiB
ReStructuredText
278 lines
11 KiB
ReStructuredText
CMake 3.2 Release Notes
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***********************
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.. only:: html
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.. contents::
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Changes made since CMake 3.1 include the following.
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New Features
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============
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Syntax
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------
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* CMake learned to support unicode characters
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:ref:`encoded as UTF-8 <CMake Language Encoding>`
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on Windows. This was already supported on platforms whose
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system APIs accept UTF-8 encoded strings.
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Unicode characters may now be used in CMake code, paths to
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source files, configured files such as ``.h.in`` files, and
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other files read and written by CMake. Note that because CMake
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interoperates with many other tools, there may still be some
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limitations when using certain unicode characters.
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Commands
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--------
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* The :command:`add_custom_command` and :command:`add_custom_target`
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commands learned a new ``BYPRODUCTS`` option to specify files
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produced as side effects of the custom commands. These are not
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outputs because they do not always have to be newer than inputs.
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* The :command:`add_custom_command` and :command:`add_custom_target`
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commands learned a new ``USES_TERMINAL`` option to request that
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the command be given direct access to the terminal if possible.
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The :generator:`Ninja` generator will places such commands in the
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``console`` :prop_gbl:`pool <JOB_POOLS>`. Build targets provided by CMake
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that are meant for individual interactive use, such as ``install``, are now
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placed in this pool.
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* A new :command:`continue` command was added that can be called inside loop
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contexts to end the current iteration and start the next one at the top of
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the loop block.
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* The :command:`file(LOCK)` subcommand was created to allow CMake
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processes to synchronize through file and directory locks.
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* The :command:`file(STRINGS)` now supports UTF-16LE, UTF-16BE,
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UTF-32LE, UTF-32BE as ``ENCODING`` options.
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* The :command:`install(EXPORT)` command now works with an absolute
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``DESTINATION`` even if targets in the export set are installed
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with a destination or :ref:`usage requirements <Target Usage Requirements>`
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specified relative to the install prefix. The value of the
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:variable:`CMAKE_INSTALL_PREFIX` variable is hard-coded into the installed
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export file as the base for relative references.
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* The :command:`try_compile` command source file signature now honors
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link flags (e.g. :variable:`CMAKE_EXE_LINKER_FLAGS`) in the generated
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test project. See policy :policy:`CMP0056`.
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* The :command:`try_run` command learned to honor the ``LINK_LIBRARIES``
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option just as :command:`try_compile` already does.
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* The :command:`file(GENERATE)` command now generates the output file with
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the same permissions as the input file if set.
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* The :command:`file(GENERATE)` command can now generate files which are
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used as source files for buildsystem targets. Generated files
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automatically get their :prop_sf:`GENERATED` property set to ``TRUE``.
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Variables
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---------
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* The :variable:`CMAKE_MATCH_COUNT` variable was introduced to record the
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number of matches made in the last regular expression matched in an
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:command:`if` command or a :command:`string` command.
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Properties
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----------
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* An :prop_tgt:`ANDROID_API_MIN` target property was introduced to
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specify the minimum version to be targeted by the toolchain.
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* A :prop_sf:`VS_SHADER_FLAGS` source file property was added to specify
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additional shader flags to ``.hlsl`` files, for the Visual Studio
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generators.
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Modules
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-------
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* The :module:`ExternalData` module learned to support
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:ref:`Custom Fetch Scripts <ExternalData Custom Fetch Scripts>`.
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This allows projects to specify custom ``.cmake`` scripts for
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fetching data objects during the build.
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* The :module:`ExternalProject` module learned options to create
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independent external project step targets that do not depend
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on the builtin steps.
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* The :module:`ExternalProject` module :command:`ExternalProject_Add`
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command learned a new ``CMAKE_CACHE_DEFAULT_ARGS`` option to
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initialize cache values in the external project without setting
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them on future builds.
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* The :module:`ExternalProject` module :command:`ExternalProject_Add`
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command learned a new ``TEST_EXCLUDE_FROM_MAIN`` option to exclude
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tests from the main build.
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* The :module:`ExternalProject` module :command:`ExternalProject_Add`
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command learned a new ``UPDATE_DISCONNECTED`` option to avoid
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automatically updating the source tree checkout from version control.
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* The :module:`FindCUDA` module learned about the ``cusolver``
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library in CUDA 7.0.
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* The :module:`FindGit` module learned to find the ``git`` command-line tool
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that comes with GitHub for Windows installed in user home directories.
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* A :module:`FindGSL` module was introduced to find the
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GNU Scientific Library.
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* A :module:`FindIntl` module was introduced to find the
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Gettext ``libintl`` library.
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* The :module:`FindLATEX` module learned to support components.
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* The :module:`FindMPI` module learned to find MS-MPI on Windows.
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* The :module:`FindOpenSSL` module now reports ``crypto`` and ``ssl``
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libraries separately in ``OPENSSL_CRYPTO_LIBRARY`` and
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``OPENSSL_SSL_LIBRARY``, respectively, to allow applications to
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link to one without the other.
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* The :module:`WriteCompilerDetectionHeader` module learned to
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create a define for portability of the ``cxx_thread_local`` feature.
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The define expands to either the C++11 ``thread_local`` keyword, or a
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pre-standardization compiler-specific equivalent, as appropriate.
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* The :module:`WriteCompilerDetectionHeader` module learned to create
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multiple output files per compiler and per language, instead of creating
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one large file.
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CTest
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-----
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* The :command:`ctest_coverage` command learned to support Delphi coverage.
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* The :command:`ctest_coverage` command learned to support Javascript coverage.
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* The :module:`CTestCoverageCollectGCOV` module was introduced as an
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alternative to the :command:`ctest_coverage` command for collecting
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``gcov`` results for submission to CDash.
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CPack
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-----
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* The :cpack_gen:`CPack RPM Generator` learned options to set per-component
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descriptions and summaries. See the
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:variable:`CPACK_RPM_<component>_PACKAGE_DESCRIPTION` and
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:variable:`CPACK_RPM_<component>_PACKAGE_SUMMARY` variables.
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* The :cpack_gen:`CPack RPM Generator` learned options to specify
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requirements for pre- and post-install scripts. See the
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:variable:`CPACK_RPM_PACKAGE_REQUIRES_PRE` and
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:variable:`CPACK_RPM_PACKAGE_REQUIRES_POST` variables.
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* The :cpack_gen:`CPack RPM Generator` learned options to specify
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requirements for pre- and post-uninstall scripts. See the
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:variable:`CPACK_RPM_PACKAGE_REQUIRES_PREUN` and
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:variable:`CPACK_RPM_PACKAGE_REQUIRES_POSTUN` variables.
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* The :cpack_gen:`CPack RPM Generator` learned a new
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:variable:`CPACK_RPM_<COMPONENT>_PACKAGE_PREFIX` variable to
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specify a component-specific value to use instead of
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:variable:`CPACK_PACKAGING_INSTALL_PREFIX`.
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* The :cpack_gen:`CPack RPM Generator` learned a new
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:variable:`CPACK_RPM_RELOCATION_PATHS` variable to
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specify multiple relocation prefixes for a single rpm package.
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Other
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-----
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* The :manual:`cmake(1)` ``-E tar`` command now supports creating
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``.xz``-compressed archives with the ``J`` flag.
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* The :manual:`cmake(1)` ``-E tar`` command learned a new
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``--files-from=<file>`` option to specify file names using
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lines in a file to overcome command-line length limits.
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* The :manual:`cmake(1)` ``-E tar`` command learned a new
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``--mtime=<date>`` option to specify the modification time
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recorded in tarball entries.
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* The :manual:`Compile Features <cmake-compile-features(7)>` functionality
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is now aware of features supported by more compilers, including:
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* Apple Clang (``AppleClang``) for Xcode versions 4.4 though 6.1.
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* GNU compiler versions 4.4 through 5.0 on UNIX and Apple (``GNU``).
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* Microsoft Visual Studio (``MSVC``) for versions 2010 through 2015.
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* Oracle SolarisStudio (``SunPro``) version 12.4.
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* The :ref:`Qt AUTORCC` feature now tracks files listed in ``.qrc`` files
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as dependencies. If an input file to the ``rcc`` tool is changed, the tool
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is automatically re-run.
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New Diagnostics
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===============
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* The :command:`break` command now rejects calls outside of a loop
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context or that pass arguments to the command.
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See policy :policy:`CMP0055`.
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Deprecated and Removed Features
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===============================
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* Files written in the :manual:`cmake-language(7)`, such as
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``CMakeLists.txt`` or ``*.cmake`` files, are now expected to be
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encoded as UTF-8. If files are already ASCII, they will be
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compatible. If files were in a different encoding, including
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Latin 1, they will need to be converted.
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* The :module:`FindOpenGL` module no longer explicitly searches
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for any dependency on X11 libraries with the :module:`FindX11`
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module. Such dependencies should not need to be explicit.
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Applications using X11 APIs themselves should find and link
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to X11 libraries explicitly.
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* The implementation of CMake now relies on some C++ compiler features which
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are not supported by some older compilers. As a result, those old compilers
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can no longer be used to build CMake itself. CMake continues to be able to
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generate Makefiles and project files for users of those old compilers
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however. Compilers known to no longer be capable of building CMake are:
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* Visual Studio 6 and 7.0 -- superseded by VisualStudio 7.1 and newer.
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* GCC 2.95 -- superseded by GCC 3 and newer compilers.
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* Borland compilers -- superseded by other Windows compilers.
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* Compaq compilers -- superseded by other compilers.
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* SGI compilers -- IRIX was dropped as a host platform.
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Other Changes
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=============
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* On Windows and OS X, commands supporting network communication
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via ``https``, such as :command:`file(DOWNLOAD)`,
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:command:`file(UPLOAD)`, and :command:`ctest_submit`, now support
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SSL/TLS even when CMake is not built against OpenSSL.
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The Windows or OS X native SSL/TLS implementation is used by default.
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OS-configured certificate authorities will be trusted automatically.
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On other platforms, when CMake is built with OpenSSL, these
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commands now search for OS-configured certificate authorities
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in a few ``/etc`` paths to be trusted automatically.
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* On OS X with Makefile and Ninja generators, when a compiler is found
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in ``/usr/bin`` it is now mapped to the corresponding compiler inside
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the Xcode application folder, if any. This allows such build
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trees to continue to work with their original compiler even when
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``xcode-select`` switches to a different Xcode installation.
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* The Visual Studio generators now write solution and project
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files in UTF-8 instead of Windows-1252. Windows-1252 supported
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Latin 1 languages such as those found in North and South America
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and Western Europe. With UTF-8, additional languages are now
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supported.
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* The :generator:`Xcode` generator no longer requires a value for
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the :variable:`CMAKE_MAKE_PROGRAM` variable to be located up front.
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It now locates ``xcodebuild`` when needed at build time.
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* When building CMake itself using SolarisStudio 12, the default ``libCStd``
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standard library is not sufficient to build CMake. The SolarisStudio
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distribution supports compiler options to use ``STLPort4`` or ``libstdc++``.
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An appropriate option to select the standard library is now added
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automatically when building CMake with SolarisStudio compilers.
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